Help! Google Chrome and Internet Explorer are flipping out!!?

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As of today, Google chrome and internet explorer will not let me log in to facebook or anything else, including gmail. I have a very important email I need to read tonight and I am loosing my mind! the message that comes up on any site I try to go on is

The site's security certificate has expired!
You attempted to reach twitter.com, but the server presented an expired certificate. No information is available to indicate whether that certificate has been compromised since its expiration. This means Google Chrome cannot guarantee that you are communicating with twitter.com and not an attacker. You should not proceed."

I do not know what to do PLEASE help!